Dell PowerVault MD3260i - Manual (Page 282)

Parameter Description
this parameter to secondary. This parameter applies only
when the virtual disk is part of a replication relationship.
force The role reversal is forced if the communications link
between the storage arrays is down and promotion or
demotion on the local side results in a dual-primary
condition or a dual-secondary condition. To force a role
reversal, set this parameter to TRUE. The default value is
FALSE.
syncPriority The priority that full synchronization has relative to host
I/O activity. Valid values are highest, high, medium,
low, or lowest.
autoResync The settings for automatic resynchronization between the
primary virtual disks and the secondary virtual disks of a
remote replication pair. This parameter has these values:
• enabled—Automatic resynchronization is
turned on. You do not need to do anything further
to resynchronize the primary virtual disk and the
secondary virtual disk.
• disabled—Automatic resynchronization is
turned off. To resynchronize the primary virtual
disks and the secondary virtual disk, you must run
the resume remoteReplication
command.
writeOrder This parameter defines write order for data transmission
between the primary virtual disk and the secondary virtual
disk. Valid values are preserved or notPreserved.
writeMode This parameter defines how the primary virtual disk writes
to the secondary virtual disk. Valid values are
synchronous or asynchronous.
Notes
When using this command, one or more of the optional parameters can be specified.
Synchronization priority defines the amount of system resources that are used to synchronize the data between the
primary virtual disks and the secondary virtual disks of a replication relationship. If the highest priority level is selected,
the data synchronization uses the most system resources to perform the full synchronization, which decreases the
performance for host data transfers.
The writeOrder parameter applies only to asynchronous replications and makes them become part of a consistency
group. Setting the writeOrder parameter to preserved causes the remote replication pair to transmit data from
the primary virtual disk to the secondary virtual disk in the same order as the host writes to the primary virtual disk. In
the event of a transmission link failure, the data is buffered until a full synchronization can occur. This action can require
additional system overhead to maintain the buffered data, which slows operations. Setting the writeOrder parameter
to notPreserved frees the system from having to maintain data in a buffer, but it requires forcing a full
synchronization to make sure that the secondary virtual disk has the same data as the primary virtual disk.
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